在高电流密度下,Ag on NiCo分层双氧化物作为氧进化电催化剂用于阳离子交换膜水电解器
Yan Sun1, Gongjin Chen1, Fatima El Bachraoui1
1Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 999077, China.
Small methods
|March 31, 2025
概括
装饰在-层双氧化物 (NiCo LDH) 上的银纳米粒子显著提高了氧演化反应 (OER) 的性能. 这种先进的电催化剂能够在水电解剂中有效地生产.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 开发高效且耐用的电催化剂对于通过水电解来进行工业化生产至关重要.
- -层双氧化物 (NiCo LDH) 显示出氧化演化反应 (OER) 的前景,但需要进一步增强.
- 寻求非贵金属催化剂以降低产生的成本.
研究的目的:
- 开发一种简单且通用的策略,用于合成Ag装饰的NiCo LDH异质结构.
- 为了研究氧化演化反应 (OER) 的Ag/NiCo LDH的电催化活性和耐久性.
- 评估Ag/NiCo LDH作为离子交换膜水电解器 (AEMWE) 中的阳极的性能.
主要方法:
- 通过自发的氧化还原反应,在NiCo LDH纳米片上装饰的Ag纳米颗粒的合成.
- 合成材料用于OER性能的电化学表征,包括超电位和电流密度测量.
- 使用Ag/NiCo LDH作为阳极的离子交换膜水电解器 (AEMWE) 的组装和测试.
主要成果:
- Ag/NiCo LDH 在 1 A cm-2 时达到 460 mV 的超电位,远低于 NiCo LDH (722 mV).
- 带有Ag/NiCo LDH阳极的AEMWE在2.10V的电压下提供了5A cm-2的超高电流密度,其性能优于现有的非贵金属阳极催化剂.
- Ag/NiCo LDH表现出极好的耐用性,在1 A cm-2下300多小时内没有性能衰变,超过了IrO2阳极的耐用性.
结论:
- 银色装饰是一种有效的策略,可以增强Nico LDH的OER活动和耐用性.
- Ag/NiCo LDH为工业生产提供了一个非常有希望的,具有成本效益的电催化剂.
- 这项工作为设计用于能源应用的先进电催化剂提供了实用方法.
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